Well my thoughts on it (edit coming)
Agree that was the most visually jarring experience between what we saw in Shadowbringers regarding Anamnesis Anyder and her determination. While I figure it was for emotional effect and resolve...I agree it makes it NOT look like it matches events in Shadowbringers (and this is not a part that has to do with Emet's retelling since Anyder was independent). However, I believe they will address this in the 24 man raid since it is Myths of the Twelve.
I also wanted to actually SEE the new life they were talking about. The second sacrifice I mean the whole thing lost impact for me because they were doing so much Hydaelyn is a grown independent primal that don't need no Ascian...that there should have been scenes SHOWING her regard for life - ESPECIALLY the new ones that THEN puts her resolve into the sundering. Also it was mentioned the newer lives were more feeble and to me that's an indicator they're also more susceptible to dynamis
It would have been THAT confirmation, instead of just "hey met this Adventurer who claims to be from the future" that she sees a possible path to salvation and confirms more about our version of events.
In fact one of the parts, I really liked regarding the voice acting with Emet in ShB was that you can FEEL the hurt and betrayal in his voice when Hydaelyn was summoned. Which to me sounds like there was genuine disagreement with Venat. I would like to think they DID have a conversation and may have inadvertently made it so that they used tempering to help with resolve. But again that's me speculating.
I just feel that it was a bit of a miss-step to not show more of her regard for life. I mean yeah doggo and bunnies are cute and all...but I really would have liked to seen the new life that divided everyone - especially since they were so philosophical about the returning to the star.